Strength enhancing admixture for concrete compositions

Claim 2

An admixture composition for Portland cement concrete containing Pozzolan, said admixture composition comprising a mixture containing at least one component from each of the following groups: (A) salts of lignosulfonic acids; hydroxylated carboxylic acids and salts thereof; and glucose polymers; (B) alkanolamines; and (C) sodium chloride; sodium nitrite; calcium nitrite; and formic acid; said components from said groups being present in the following amounts, based upon the combined weight of cement and pozzolan in said concrete; Group (A), 0.014 to 0.203 percent by weight; Group (B), 0.005 to 0.300 percent by weight; and Group (C), 0.050 to 0.300 percent by weight.

Claim 3

The admixture composition of claim 1 comprised of a mixture containing (A) a salt of lignosulfonic acid; (B) triethanolamine; and (C) sodium chloride.

Claim 4

The admixture composition of claim 1 comprised of a mixture containing (A) a salt of gluconic acid or of heptogluconic acid; (B) triethanolamine; and (C) sodium chloride.

Claim 5

The admixture composition of claim 1 comprised of a mixture containing (A) a salt of gluconic acid or of heptogluconic acid; (B) an alkanolamine, (C) at least one member from the group consisting of sodium chloride, sodium nitrite, calcium nitrite and formic acid; and (D) a salt of lignosulfonic acid.

Claim 6

A concrete composition comprising Portland cement, pozzolan, and an admixture to improve the properties thereof, said admixture composition comprising a mixture containing at least one component from each of the following groups; (A) salts of lignosulfonic acids; hydroxylated carboxylic acids and salts thereof; and glucose polymers; (B) alkanolamines; and (C) sodium chloride; sodium nitrite; calcium nitrite; and formic acid; said components from said Groups being present in the following amounts, based upon the weight of said cement and pozzolan: Group (A) about 0.014 to 0.203 percent by weight Group (B) about 0.005 to 0.300 percent by weight Group (C) about 0.050 to 0.300 percent by weight.

Claim 7

A concrete composition comprising Portland cement, pozzolan, and an admixture to improve the properties thereof, said admixture composition comprising a mixture containing at least one component from each of the following groups; (A) salts of lignosulfonic acids; hydroxylated carboxylic acids and salts thereof; and glucose polymers; (B) alkanolamines; and (C) sodium chloride; sodium nitrite; calcium nitrite; and formic acid; said components from said Groups being present in the following amounts, based upon the weight of said cement and pozzolan: Group (A) about 0.014 to 0.203 percent by weight Group (B) about 0.005 to 0.300 percent by weight Group (C) about 0.050 to 0.300 percent by weight.

Claim 8

The concrete composition of claim 5 wherein said pozzolan is fly ash, natural pozzolan, blast furnace slag, or a mixture of such.

Claim 9

The concrete composition of claim 5 wherein said admixture is comprised of a mixture containing (A) salt of lignosulfonic acid; (B) triethanolamine; and (C) sodium chloride.

Claim 10

The concrete composition of claim 5 wherein said admixture is comprised of a mixture containing (A) a salt of gluconic acid or of heptogluconic acid; (B) triethanolamine; and (C) sodium chloride.

Claim 11

The concrete composition of claim 5 wherein said admixture is comprised of a mixture containing (A) a salt of gluconic acid or of heptogluconic acid; (B) an alkanolamine, (C) at least one member from the group consisting of sodium chloride, sodium nitrite, calcium nitrite and formic acid; and (D) a salt of lignosulfonic acid.